Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth
The degradation of permafrost caused by climate warming accelerates the infiltration and evaporation of water, destroys the hydrological system, and increases the drought stress of boreal forests. However, how climate warming and permafrost degradation affect intrinsic Water Use Efficiency (iWUE) an...
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ftchacadscircees:oai:/ir.rcees.ac.cn:311016/47215 2023-06-11T04:15:54+02:00 Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth Chen, Zecheng Zhang, Yuandong Li, Zongshan Han, Shijie Wang, Xiaochun 2022-06-01 https://ir.rcees.ac.cn/handle/311016/47215 unknown AGRICULTURAL AND FOREST METEOROLOGY https://ir.rcees.ac.cn/handle/311016/47215 cn.org.cspace.api.content.CopyrightPolicy@147c7bad CARBON-ISOTOPE DISCRIMINATION TREE-RING DELTA-C-13 PINUS-SYLVESTRIS RADIAL GROWTH FOREST ECOSYSTEMS ATMOSPHERIC CO2 NORWAY SPRUCE ELEVATED CO2 SCOTS PINE LARCH 期刊论文 2022 ftchacadscircees 2023-05-28T12:17:12Z The degradation of permafrost caused by climate warming accelerates the infiltration and evaporation of water, destroys the hydrological system, and increases the drought stress of boreal forests. However, how climate warming and permafrost degradation affect intrinsic Water Use Efficiency (iWUE) and tree growth is not fully understood. Using tree-ring width and stable carbon isotope composition (delta C-13) data, we analyzed the growth and iWUE of Larix gmelinii on slopes and gullies in three different permafrost degradation areas in Daxing'an Mountains, China. The results showed that the iWUE of L. gmelinii increased significantly in all areas from 1900 to 2015. Radial growth and the ratio of intercellular (C-i) and ambient (Ca) CO2 concentration was significantly negatively correlated with temperature and positively correlated with Palmer Drought Severity Index (PDSI) in severe degradation permafrost areas. Meanwhile, radial growth (basal area increment, BAI) has decreased significantly in recent 40 years, and the decline rate of radial growth in slope topographies was higher than that in gully topographies. Growing season temperature was generally positively correlated with iWUE, but negatively correlated with the radial growth of L. gmelinii. The increase of iWUE was negatively correlated with the radial growth of L. gmelinii. The response of BAI, iWUE, and C-i/C-a to temperature rise and water change was weak in the mild degradation area, and radial growth still increased. In severe and moderate degradation areas, tree physiology (iWUE and C-i/C-a) was driven by temperature and PDSI, indicating that L. gmelinii adopted a conservative water-saving stomatal strategy, and increasing iWUE did not promote tree growth. Although the water use efficiency of L. gmelinii in the southern edge of permafrost area increased with the increase in temperature, it may face more serious drought stress and growth decline in the future. Report permafrost Research Center for Eco-Environmental Sciences: RCEES OpenIR (Chinese Academy of Sciences) Norway |
institution |
Open Polar |
collection |
Research Center for Eco-Environmental Sciences: RCEES OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchacadscircees |
language |
unknown |
topic |
CARBON-ISOTOPE DISCRIMINATION TREE-RING DELTA-C-13 PINUS-SYLVESTRIS RADIAL GROWTH FOREST ECOSYSTEMS ATMOSPHERIC CO2 NORWAY SPRUCE ELEVATED CO2 SCOTS PINE LARCH |
spellingShingle |
CARBON-ISOTOPE DISCRIMINATION TREE-RING DELTA-C-13 PINUS-SYLVESTRIS RADIAL GROWTH FOREST ECOSYSTEMS ATMOSPHERIC CO2 NORWAY SPRUCE ELEVATED CO2 SCOTS PINE LARCH Chen, Zecheng Zhang, Yuandong Li, Zongshan Han, Shijie Wang, Xiaochun Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth |
topic_facet |
CARBON-ISOTOPE DISCRIMINATION TREE-RING DELTA-C-13 PINUS-SYLVESTRIS RADIAL GROWTH FOREST ECOSYSTEMS ATMOSPHERIC CO2 NORWAY SPRUCE ELEVATED CO2 SCOTS PINE LARCH |
description |
The degradation of permafrost caused by climate warming accelerates the infiltration and evaporation of water, destroys the hydrological system, and increases the drought stress of boreal forests. However, how climate warming and permafrost degradation affect intrinsic Water Use Efficiency (iWUE) and tree growth is not fully understood. Using tree-ring width and stable carbon isotope composition (delta C-13) data, we analyzed the growth and iWUE of Larix gmelinii on slopes and gullies in three different permafrost degradation areas in Daxing'an Mountains, China. The results showed that the iWUE of L. gmelinii increased significantly in all areas from 1900 to 2015. Radial growth and the ratio of intercellular (C-i) and ambient (Ca) CO2 concentration was significantly negatively correlated with temperature and positively correlated with Palmer Drought Severity Index (PDSI) in severe degradation permafrost areas. Meanwhile, radial growth (basal area increment, BAI) has decreased significantly in recent 40 years, and the decline rate of radial growth in slope topographies was higher than that in gully topographies. Growing season temperature was generally positively correlated with iWUE, but negatively correlated with the radial growth of L. gmelinii. The increase of iWUE was negatively correlated with the radial growth of L. gmelinii. The response of BAI, iWUE, and C-i/C-a to temperature rise and water change was weak in the mild degradation area, and radial growth still increased. In severe and moderate degradation areas, tree physiology (iWUE and C-i/C-a) was driven by temperature and PDSI, indicating that L. gmelinii adopted a conservative water-saving stomatal strategy, and increasing iWUE did not promote tree growth. Although the water use efficiency of L. gmelinii in the southern edge of permafrost area increased with the increase in temperature, it may face more serious drought stress and growth decline in the future. |
format |
Report |
author |
Chen, Zecheng Zhang, Yuandong Li, Zongshan Han, Shijie Wang, Xiaochun |
author_facet |
Chen, Zecheng Zhang, Yuandong Li, Zongshan Han, Shijie Wang, Xiaochun |
author_sort |
Chen, Zecheng |
title |
Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth |
title_short |
Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth |
title_full |
Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth |
title_fullStr |
Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth |
title_full_unstemmed |
Climate change increased the intrinsic water use efficiency of Larix gmelinii in permafrost degradation areas, but did not promote its growth |
title_sort |
climate change increased the intrinsic water use efficiency of larix gmelinii in permafrost degradation areas, but did not promote its growth |
publishDate |
2022 |
url |
https://ir.rcees.ac.cn/handle/311016/47215 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
AGRICULTURAL AND FOREST METEOROLOGY https://ir.rcees.ac.cn/handle/311016/47215 |
op_rights |
cn.org.cspace.api.content.CopyrightPolicy@147c7bad |
_version_ |
1768373130823204864 |